ui: rename the Phone simulator tab to Simulator and the eSIM pill to eSIM LPA (v3.5.12)

- Top-level tab label "Phone simulator" -> "Simulator" (RU "Симулятор");
  the DOM ids stay tab-phone / phone-sub-*.
- The eSIM pill inside the Simulator tab is now "eSIM LPA" (EN/RU),
  matching the section's ES10/LPA scope; the panel id stays phone-sub-esim.
- Documentation updated: help EN/RU (section 8 Simulator, list of the four
  pills including Test script, tab lists and cross-references),
  README/README_RUS (tab lists, Simulator section, eSIM LPA), AGENTS
  repo/root.
- Test titles updated; version 3.5.12; sw cache simple-v265.

579 frontend / 467 Python green.

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "pysim-simple-server"
-version = "3.5.11"
+version = "3.5.12"
 description = "HTTP REST server wrapping pysim for the SIMple PWA"
 requires-python = ">=3.8"
 # pysim is a git-only dependency installed explicitly by setup.bat/setup.sh.